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Wed, Feb 14, 2018 9:31 pm

Extracting embedded Microsoft Office files from an Excel spreadsheet

I work with Excel workbooks on my MacBook Pro laptop that have embedded PowerPoint slides on some worksheets. The workbooks, which I need to review, are created by others. When I review them, I extract information from the Excel workbooks to an SQLite database with Python and also have begun extracting information embedded by Object Linking and Embedding (OLE) into files as noted in Extracting the contents of a directory in a zipfile using Python. Some of the embedded files are PowerPoint files, but when they are extracted they have a .bin extension, which I can't open in PowerPoint without changing the filename extension from .bin to .ppt. To automate the renaming process, I created a Python script, extract_embedded.py that will extract the embedded information to files in an "embedded" directory beneath the current working directory and then rename any .bin files that are PowerPoint files to have a .ppt extension. The script is shown below.

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